I had him on the kitchen table with the curtains drawn and the blinds cracked, but then I moved Bizzy into the bathroom, really just because I thought It would be cool to have a living element in there.

I dont have an overhead light source on my Marina 2L, but sometimes I just leave the bathroom light on.

Your betta really doesn't have any particular needs for light. It's really about the aesthetics. For a small container, you need to make sure that the light you buy doesn't get too hot...it could send your water temps skyrocketing! I like "night-lights" or LEDs. Keep in mind, though, that even a night light will get hot enough to change the temperature in a 1/2-gallon of water!

I was just curious of how well it worked for you? Also did you have a light for your cube?

I purchased one that is a light and heat source at the same time, but am thinking of returning it, because It doesn't quite fit the way I would like it to, and I fear it may overheat, since it does not have an automatic shut off.

It just occurred to me that your temperature might not be too stable in the bathroom, even with a heater. I say this because of the shower. If that's where you're showering everyday, I'd imagine the temperature would rise during that time because of all the steam produced and such. Those fluctuations might be harmful, depending on how extreme they are.

I turn the vent hood on when I go shower, and yes, it is where I shower everyday (sometimes...). The vent works pretty well, and since I just set up the thermometer, I'm gonna check it the next time I shower. If I find that the temp does go up to high, it's back to the Kitchen table with him.

It just occurred to me that your temperature might not be too stable in the bathroom, even with a heater. I say this because of the shower. If that's where you're showering everyday, I'd imagine the temperature would rise during that time because of all the steam produced and such. Those fluctuations might be harmful, depending on how extreme they are.